1. Importing All Libraries
In [1]:
%matplotlib inline
import numpy as np
import pandas as pd
from sklearn.metrics import mean_squared_error
from sklearn.utils import check_random_state
from sklearn.tree import DecisionTreeClassifier
import numpy as np
from sklearn.model_selection import ParameterGrid
from sklearn.svm import SVR
import pandas as pd
from sklearn.dummy import DummyRegressor
import seaborn as sns
from matplotlib import pyplot as plt
from sklearn.model_selection import train_test_split
from sklearn.tree import DecisionTreeClassifier
from sklearn import metrics
from sklearn.linear_model import LogisticRegression
from sklearn.metrics import confusion_matrix, recall_score, precision_score, f1_score, roc_auc_score,accuracy_score
from sklearn.metrics import precision_recall_fscore_support
from sklearn.model_selection import GridSearchCV
from sklearn.ensemble import BaggingClassifier
from sklearn.tree import export_graphviz
from sklearn.ensemble import AdaBoostClassifier
from sklearn.linear_model import LinearRegression
from six import StringIO  
from sklearn.model_selection import RandomizedSearchCV
from sklearn.ensemble import BaggingRegressor
from scipy.stats import randint as sp_randint
from sklearn.neighbors import KNeighborsRegressor
from sklearn.ensemble import BaggingRegressor
from IPython.display import Image  
import pydotplus
import graphviz
from math import sqrt
from sklearn.model_selection import cross_val_score
%matplotlib inline

from sklearn.feature_extraction.text import CountVectorizer  #DT does not take strings as input for the model fit step....
  1. Read CSV file
In [2]:
concrete_df = pd.read_csv("/content/sample_data/concrete.csv")
concrete_df
Out[2]:
cement slag ash water superplastic coarseagg fineagg age strength
0 141.3 212.0 0.0 203.5 0.0 971.8 748.5 28 29.89
1 168.9 42.2 124.3 158.3 10.8 1080.8 796.2 14 23.51
2 250.0 0.0 95.7 187.4 5.5 956.9 861.2 28 29.22
3 266.0 114.0 0.0 228.0 0.0 932.0 670.0 28 45.85
4 154.8 183.4 0.0 193.3 9.1 1047.4 696.7 28 18.29
... ... ... ... ... ... ... ... ... ...
1025 135.0 0.0 166.0 180.0 10.0 961.0 805.0 28 13.29
1026 531.3 0.0 0.0 141.8 28.2 852.1 893.7 3 41.30
1027 276.4 116.0 90.3 179.6 8.9 870.1 768.3 28 44.28
1028 342.0 38.0 0.0 228.0 0.0 932.0 670.0 270 55.06
1029 540.0 0.0 0.0 173.0 0.0 1125.0 613.0 7 52.61

1030 rows × 9 columns

  1. Read into vars for splitting
In [3]:
X = concrete_df.drop(['strength'],axis=1)
y = concrete_df['strength']
print(X.shape)
print(y.shape)
print(concrete_df.info())
print(X)
print(y)

(1030, 8)
(1030,)
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 1030 entries, 0 to 1029
Data columns (total 9 columns):
 #   Column        Non-Null Count  Dtype  
---  ------        --------------  -----  
 0   cement        1030 non-null   float64
 1   slag          1030 non-null   float64
 2   ash           1030 non-null   float64
 3   water         1030 non-null   float64
 4   superplastic  1030 non-null   float64
 5   coarseagg     1030 non-null   float64
 6   fineagg       1030 non-null   float64
 7   age           1030 non-null   int64  
 8   strength      1030 non-null   float64
dtypes: float64(8), int64(1)
memory usage: 72.5 KB
None
      cement   slag    ash  water  superplastic  coarseagg  fineagg  age
0      141.3  212.0    0.0  203.5           0.0      971.8    748.5   28
1      168.9   42.2  124.3  158.3          10.8     1080.8    796.2   14
2      250.0    0.0   95.7  187.4           5.5      956.9    861.2   28
3      266.0  114.0    0.0  228.0           0.0      932.0    670.0   28
4      154.8  183.4    0.0  193.3           9.1     1047.4    696.7   28
...      ...    ...    ...    ...           ...        ...      ...  ...
1025   135.0    0.0  166.0  180.0          10.0      961.0    805.0   28
1026   531.3    0.0    0.0  141.8          28.2      852.1    893.7    3
1027   276.4  116.0   90.3  179.6           8.9      870.1    768.3   28
1028   342.0   38.0    0.0  228.0           0.0      932.0    670.0  270
1029   540.0    0.0    0.0  173.0           0.0     1125.0    613.0    7

[1030 rows x 8 columns]
0       29.89
1       23.51
2       29.22
3       45.85
4       18.29
        ...  
1025    13.29
1026    41.30
1027    44.28
1028    55.06
1029    52.61
Name: strength, Length: 1030, dtype: float64

3. Find any missing values in dataframe

In [41]:
concrete_df.isna().sum()
Out[41]:
cement          0
slag            0
ash             0
water           0
superplastic    0
coarseagg       0
fineagg         0
age             0
strength        0
dtype: int64

4. Find Correaltion between each variable

In [42]:
cor = concrete_df.corr()
cor
Out[42]:
cement slag ash water superplastic coarseagg fineagg age strength
cement 1.000000 -0.275216 -0.397467 -0.081587 0.092386 -0.109349 -0.222718 0.081946 0.497832
slag -0.275216 1.000000 -0.323580 0.107252 0.043270 -0.283999 -0.281603 -0.044246 0.134829
ash -0.397467 -0.323580 1.000000 -0.256984 0.377503 -0.009961 0.079108 -0.154371 -0.105755
water -0.081587 0.107252 -0.256984 1.000000 -0.657533 -0.182294 -0.450661 0.277618 -0.289633
superplastic 0.092386 0.043270 0.377503 -0.657533 1.000000 -0.265999 0.222691 -0.192700 0.366079
coarseagg -0.109349 -0.283999 -0.009961 -0.182294 -0.265999 1.000000 -0.178481 -0.003016 -0.164935
fineagg -0.222718 -0.281603 0.079108 -0.450661 0.222691 -0.178481 1.000000 -0.156095 -0.167241
age 0.081946 -0.044246 -0.154371 0.277618 -0.192700 -0.003016 -0.156095 1.000000 0.328873
strength 0.497832 0.134829 -0.105755 -0.289633 0.366079 -0.164935 -0.167241 0.328873 1.000000

5. Describe Characteristics of each variable

In [43]:
concrete_df.describe
Out[43]:
<bound method NDFrame.describe of       cement   slag    ash  water  ...  coarseagg  fineagg  age  strength
0      141.3  212.0    0.0  203.5  ...      971.8    748.5   28     29.89
1      168.9   42.2  124.3  158.3  ...     1080.8    796.2   14     23.51
2      250.0    0.0   95.7  187.4  ...      956.9    861.2   28     29.22
3      266.0  114.0    0.0  228.0  ...      932.0    670.0   28     45.85
4      154.8  183.4    0.0  193.3  ...     1047.4    696.7   28     18.29
...      ...    ...    ...    ...  ...        ...      ...  ...       ...
1025   135.0    0.0  166.0  180.0  ...      961.0    805.0   28     13.29
1026   531.3    0.0    0.0  141.8  ...      852.1    893.7    3     41.30
1027   276.4  116.0   90.3  179.6  ...      870.1    768.3   28     44.28
1028   342.0   38.0    0.0  228.0  ...      932.0    670.0  270     55.06
1029   540.0    0.0    0.0  173.0  ...     1125.0    613.0    7     52.61

[1030 rows x 9 columns]>

6.Info about each variable in DF

In [44]:
concrete_df.info()

<class 'pandas.core.frame.DataFrame'>
RangeIndex: 1030 entries, 0 to 1029
Data columns (total 9 columns):
 #   Column        Non-Null Count  Dtype  
---  ------        --------------  -----  
 0   cement        1030 non-null   float64
 1   slag          1030 non-null   float64
 2   ash           1030 non-null   float64
 3   water         1030 non-null   float64
 4   superplastic  1030 non-null   float64
 5   coarseagg     1030 non-null   float64
 6   fineagg       1030 non-null   float64
 7   age           1030 non-null   int64  
 8   strength      1030 non-null   float64
dtypes: float64(8), int64(1)
memory usage: 72.5 KB

7. Find count of any missing values

In [45]:
concrete_df.isnull().count()
Out[45]:
cement          1030
slag            1030
ash             1030
water           1030
superplastic    1030
coarseagg       1030
fineagg         1030
age             1030
strength        1030
dtype: int64

8. Print out names of all the columns in dataframe

In [46]:
concrete_df.columns
Out[46]:
Index(['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg',
       'fineagg', 'age', 'strength'],
      dtype='object')

9. Print all stats/metrics of each columns

In [47]:
concrete_df.describe().transpose()
Out[47]:
count mean std min 25% 50% 75% max
cement 1030.0 281.167864 104.506364 102.00 192.375 272.900 350.000 540.0
slag 1030.0 73.895825 86.279342 0.00 0.000 22.000 142.950 359.4
ash 1030.0 54.188350 63.997004 0.00 0.000 0.000 118.300 200.1
water 1030.0 181.567282 21.354219 121.80 164.900 185.000 192.000 247.0
superplastic 1030.0 6.204660 5.973841 0.00 0.000 6.400 10.200 32.2
coarseagg 1030.0 972.918932 77.753954 801.00 932.000 968.000 1029.400 1145.0
fineagg 1030.0 773.580485 80.175980 594.00 730.950 779.500 824.000 992.6
age 1030.0 45.662136 63.169912 1.00 7.000 28.000 56.000 365.0
strength 1030.0 35.817961 16.705742 2.33 23.710 34.445 46.135 82.6

10. Print Skew of each variable

In [48]:
concrete_df.skew().sort_values(ascending=False)
Out[48]:
age             3.269177
superplastic    0.907203
slag            0.800717
ash             0.537354
cement          0.509481
strength        0.416977
water           0.074628
coarseagg      -0.040220
fineagg        -0.253010
dtype: float64

11. Print unbiased Kurtosis

In [49]:
concrete_df.kurt().sort_values(ascending=False)
Out[49]:
age             12.168989
superplastic     1.411269
water            0.122082
fineagg         -0.102177
strength        -0.313725
slag            -0.508175
cement          -0.520652
coarseagg       -0.599016
ash             -1.328746
dtype: float64

12. Print all correlation which have a considerable significant impact on each other

In [52]:
df = concrete_df.corr()
df.columns
df[((df > 0.3) & (df < 1))| (df < -0.3)].dropna(how='all')
Out[52]:
cement slag ash water superplastic coarseagg fineagg age strength
cement NaN NaN -0.397467 NaN NaN NaN NaN NaN 0.497832
slag NaN NaN -0.323580 NaN NaN NaN NaN NaN NaN
ash -0.397467 -0.32358 NaN NaN 0.377503 NaN NaN NaN NaN
water NaN NaN NaN NaN -0.657533 NaN -0.450661 NaN NaN
superplastic NaN NaN 0.377503 -0.657533 NaN NaN NaN NaN 0.366079
fineagg NaN NaN NaN -0.450661 NaN NaN NaN NaN NaN
age NaN NaN NaN NaN NaN NaN NaN NaN 0.328873
strength 0.497832 NaN NaN NaN 0.366079 NaN NaN 0.328873 NaN

13. Beginning of Univariate analysis.

In [53]:
# the for loop here prints out the distplots for each of the column to help in univariate analysis
for i in ['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg',
       'fineagg', 'age']:
       sns.distplot(concrete_df[i])
       plt.show()

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)

/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:2551: FutureWarning: `distplot` is a deprecated function and will be removed in a future version. Please adapt your code to use either `displot` (a figure-level function with similar flexibility) or `histplot` (an axes-level function for histograms).
  warnings.warn(msg, FutureWarning)
In [58]:
for i in ['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg',
       'fineagg', 'age']:
       sns.histplot(concrete_df[i])
       plt.show()

14.Beginning of Bivariate Analysis

In [54]:
# Use pair plots on only variables with interesting correlations only

sns.pairplot(concrete_df,hue='strength',diag_kind ='kde',plot_kws = {'alpha': 0.6, 's': 80, 'edgecolor': 'k'},
             size = 4,vars = ['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg', 'fineagg', 'age']) 

Streaming output truncated to the last 5000 lines.
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  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
/usr/local/lib/python3.6/dist-packages/seaborn/distributions.py:305: UserWarning: Dataset has 0 variance; skipping density estimate.
  warnings.warn(msg, UserWarning)
Out[54]:
<seaborn.axisgrid.PairGrid at 0x7f554ba44828>
In [55]:
# Another way of visualizing pair plots for reference
grid = sns.PairGrid(data= concrete_df,
                    vars = ['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg', 'fineagg', 'age','strength'], size = 4)
grid = grid.map_upper(sns.scatterplot)
grid = grid.map_diag(plt.hist, bins = 10, color = 'darkred', edgecolor = 'k')
grid = grid.map_lower(sns.kdeplot)

/usr/local/lib/python3.6/dist-packages/seaborn/axisgrid.py:1150: UserWarning: The `size` parameter has been renamed to `height`; please update your code.
  warnings.warn(UserWarning(msg))
In [56]:
# this prints out the heatmap of the correlations for each of the column to help in bivariate analysis
# From the heatmap we can see pdays, previous and poutcome have high correlation with each other.

# Even then this is plays a very mild impact on 'Target'. So we can conclude from this that only 

plt.figure(figsize=(20,10))
sns.heatmap(concrete_df.corr(),annot=True,linewidths=.5,center=0,cbar=True,cmap="YlGnBu",vmin=-1,vmax=+1)
plt.show()

15. Binning and Labeling edges for the better visualizations.

In [59]:
bin_edges = [0,10,20,30,40,50,60,70,80,90]         # edges to define intervals
bin_labels = ['0-10', '11-20', '21-30','31-40', '41-50', '51-60','61-70','71-80', '81-90']             
# labels to denote each interval
concrete_df['strength'] = pd.cut(concrete_df.strength, bins=bin_edges , labels=bin_labels)
# pd.cut is used to divide the continous column in different groups as per bin egges and named according to bin label.
concrete_df
Out[59]:
cement slag ash water superplastic coarseagg fineagg age strength
0 141.3 212.0 0.0 203.5 0.0 971.8 748.5 28 21-30
1 168.9 42.2 124.3 158.3 10.8 1080.8 796.2 14 21-30
2 250.0 0.0 95.7 187.4 5.5 956.9 861.2 28 21-30
3 266.0 114.0 0.0 228.0 0.0 932.0 670.0 28 41-50
4 154.8 183.4 0.0 193.3 9.1 1047.4 696.7 28 11-20
... ... ... ... ... ... ... ... ... ...
1025 135.0 0.0 166.0 180.0 10.0 961.0 805.0 28 11-20
1026 531.3 0.0 0.0 141.8 28.2 852.1 893.7 3 41-50
1027 276.4 116.0 90.3 179.6 8.9 870.1 768.3 28 41-50
1028 342.0 38.0 0.0 228.0 0.0 932.0 670.0 270 51-60
1029 540.0 0.0 0.0 173.0 0.0 1125.0 613.0 7 51-60

1030 rows × 9 columns

In [60]:
# the for loop here prints out the boxplots for each of the column to help in univariate analysis
for i in ['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg','fineagg', 'age']:
       sns.boxplot(x='strength',y=i,data=concrete_df)
       plt.show()
In [61]:
#Split the dataset into train set test set also the validation
from sklearn.model_selection import train_test_split
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = .30, random_state=1)
#X_train, X_val, y_train, y_val = train_test_split(X_train, y_train, test_size=0.25, random_state=1)

regression_model = LinearRegression()
regression_model.fit(X_train,y_train)
X_train
Out[61]:
cement slag ash water superplastic coarseagg fineagg age
185 350.0 0.0 0.0 203.0 0.0 974.0 775.0 14
286 374.0 189.2 0.0 170.1 10.1 926.1 756.7 91
600 277.0 0.0 0.0 191.0 0.0 968.0 856.0 3
691 380.0 95.0 0.0 228.0 0.0 932.0 594.0 7
474 356.0 0.0 142.0 193.0 11.0 801.0 778.0 28
... ... ... ... ... ... ... ... ...
960 251.8 0.0 99.9 146.1 12.4 1006.0 899.8 3
847 165.0 0.0 143.6 163.8 0.0 1005.6 900.9 3
715 303.6 139.9 0.0 213.5 6.2 895.5 722.5 28
905 318.0 0.0 126.0 210.0 6.0 861.0 737.0 28
235 236.0 0.0 0.0 194.0 0.0 968.0 885.0 3

721 rows × 8 columns

In [62]:
for idx, col_name in enumerate(X_train.columns):
    print("The coefficient for {} is {}".format(col_name, regression_model.coef_[idx]))

The coefficient for cement is 0.12655755592921453
The coefficient for slag is 0.10882841423627024
The coefficient for ash is 0.09070514083244802
The coefficient for water is -0.10315724008089977
The coefficient for superplastic is 0.37612343073244114
The coefficient for coarseagg is 0.024028594961397136
The coefficient for fineagg is 0.036192894560112286
The coefficient for age is 0.11043496734221796
In [63]:
regression_model.score(X_train,y_train)
Out[63]:
0.6031487540630229
In [64]:
regression_model.score(X_test,y_test)
Out[64]:
0.6339136715208276
In [65]:
from sklearn.preprocessing import PolynomialFeatures
from sklearn import linear_model

poly = PolynomialFeatures(degree=2, interaction_only=True)
X_train2 = poly.fit_transform(X_train)
X_test2 = poly.fit_transform(X_test)

poly_clf = linear_model.LinearRegression()

poly_clf.fit(X_train2, y_train)

y_pred = poly_clf.predict(X_test2)

#print(y_pred)

#In sample (training) R^2 will always improve with the number of variables!
print(poly_clf.score(X_train2, y_train))

0.7549578268848264
In [66]:
from sklearn.preprocessing import PolynomialFeatures
from sklearn import linear_model

poly = PolynomialFeatures(degree=4, interaction_only=True)
X_train3 = poly.fit_transform(X_train)
X_test3 = poly.fit_transform(X_test)

poly_clf = linear_model.LinearRegression()

poly_clf.fit(X_train3, y_train)

y_pred = poly_clf.predict(X_test3)

#print(y_pred)

#In sample (training) R^2 will always improve with the number of variables!
print(poly_clf.score(X_train3, y_train))

0.8535208403345766
In [67]:
from sklearn.preprocessing import PolynomialFeatures
from sklearn import linear_model

poly = PolynomialFeatures(degree=6, interaction_only=True)
X_train4 = poly.fit_transform(X_train)
X_test4 = poly.fit_transform(X_test)

poly_clf = linear_model.LinearRegression()

poly_clf.fit(X_train4, y_train)

y_pred = poly_clf.predict(X_test4)

#print(y_pred)

#In sample (training) R^2 will always improve with the number of variables!
print(poly_clf.score(X_train4, y_train))

0.8618818869275249

Part 2

  1. Splitting Train and Test and Cross Validation into 60:20:20 ratio
In [4]:
from sklearn.model_selection import train_test_split 

X_Train, X_test, Y_Train, y_test = train_test_split(X,y, random_state = 1,test_size=0.2,train_size=0.8)
X_train, x_cv, y_train, y_cv = train_test_split(X_Train,Y_Train,test_size = 0.25,train_size =0.75,random_state=1)
  1. Building Model for DT including all features with K-Fold Cross Validation ( CV )
In [5]:
import numpy as np
from sklearn.tree import DecisionTreeRegressor
import matplotlib.pyplot as plt
dt = DecisionTreeRegressor()

dt.fit(X_train, y_train)

pred1 = dt.predict(x_cv)  # Predictions from logistic regression
score1 = dt.score(x_cv, y_cv)
print(score1)

kf1 =  cross_val_score(dt, x_cv, y_cv, cv = 5).mean()
print(kf1)

dtmse = mean_squared_error(pred1,y_cv)
print(dtmse)

0.8518703885831054
0.5639506231053608
45.75918762135921
  1. Building Model for RF including all features with K-Fold Cross Validation ( CV )
In [6]:
#Including all features
from sklearn.ensemble import RandomForestRegressor

rf1 = RandomForestRegressor()

rf1.fit(X_train, y_train)
pred1rf = rf1.predict(x_cv)
score3 = rf1.score(x_cv, y_cv)
print(score3)

kf2 =  cross_val_score(rf1, x_cv, y_cv, cv = 5).mean()
print(kf2)

pred1rfmse = mean_squared_error(pred1rf,y_cv)
print(pred1rfmse)

0.9055943530708866
0.779910180359029
29.163147523469394
  1. Building Model for Ada Boost including all features with K-Fold Cross Validation ( CV )
In [7]:
from sklearn.ensemble import AdaBoostRegressor

adbr = AdaBoostRegressor(base_estimator=rf1)

adbr.fit(X_train,y_train)
predadbr = adbr.predict(x_cv)
score5 = adbr.score(x_cv,y_cv)
print(score5)

kf3 =  cross_val_score(adbr, x_cv, y_cv, cv = 5).mean()
print(kf3)

predadbrmse = mean_squared_error(predadbr,y_cv)
print(predadbrmse)

0.9099684959150989
0.8020766118598835
27.81191719770008
  1. Building Model for Bagging Regressor including all features with K-Fold Cross Validation ( CV )
In [8]:
from sklearn.ensemble import BaggingRegressor

br1 = BaggingRegressor(base_estimator=rf1)

br1.fit(X_train,y_train)
predbr1 = br1.predict(x_cv)
score7 = br1.score(x_cv,y_cv)
print(score7)

kf7 =  cross_val_score(br1, x_cv, y_cv, cv = 5).mean()
print(kf7)

predbr1mse = mean_squared_error(predbr1,y_cv)
print(predbr1mse)

0.8927996879773722
0.7694256379213987
33.11558805825776
  1. Creating feature importance set from dt
In [9]:
pd.Series(dt.feature_importances_, X_train.columns ).sort_values(ascending= False)
Out[9]:
cement          0.383665
age             0.304451
water           0.127209
slag            0.105536
fineagg         0.028624
superplastic    0.019900
coarseagg       0.018699
ash             0.011917
dtype: float64
In [10]:
feature_set = ['cement',           
'age',                        
'water',                          
'slag',                      
'fineagg',
'coarseagg'
]
In [11]:
X_Train, X_test, Y_Train, y_test = train_test_split(X.loc[:,feature_set],y, random_state = 1,test_size=0.2,train_size=0.8)
X_train, x_cv, y_train, y_cv = train_test_split(X_Train,Y_Train,test_size = 0.25,train_size =0.75,random_state=1)
  1. Building Model for DT including features set with K-Fold Cross Validation ( CV )
In [12]:
import numpy as np
from sklearn.tree import DecisionTreeRegressor
import matplotlib.pyplot as plt
dt2 = DecisionTreeRegressor()

dt2.fit(X_train, y_train)

pred2 = dt2.predict(x_cv)  # Predictions from logistic regression
score2 = dt2.score(x_cv, y_cv)
print(score2)

kf4 =  cross_val_score(dt2, x_cv, y_cv, cv = 5).mean()
print(kf4)

pred2mse = mean_squared_error(pred2,y_cv)
print(pred2mse)

0.8871661704808851
0.6122094298592187
34.855855798274
  1. Building Model for RF including features set with K-Fold Cross Validation ( CV )
In [13]:
#Including feature_set
from sklearn.ensemble import RandomForestRegressor

rf2 = RandomForestRegressor()

rf2.fit(X_train, y_train)
pred2rf = rf2.predict(x_cv)
score4 = rf2.score(x_cv, y_cv)
print(score4)

kf5 =  cross_val_score(rf2, x_cv, y_cv, cv = 5).mean()
print(kf5)

pred2rfmse = mean_squared_error(pred2rf,y_cv)
print(pred2rfmse)

0.8985707514736628
0.7829047955899229
31.33283054761848
  1. Building Model for Ada Boost including features set with K-Fold Cross Validation ( CV )
In [14]:
from sklearn.ensemble import AdaBoostRegressor

adbr2 = AdaBoostRegressor(base_estimator=rf2)

adbr2.fit(X_train,y_train)
predadbr2 = adbr2.predict(x_cv)
score6 = adbr2.score(x_cv,y_cv)
print(score6)

kf6 =  cross_val_score(adbr2, x_cv, y_cv, cv = 5).mean()
print(kf6)

predadbr2mse = mean_squared_error(predadbr2,y_cv)
print(predadbr2mse)

0.9008609841610992
0.7959136241105609
30.62534751138734

13.Building Model for Bagging Regressor including features set with K-Fold Cross Validation ( CV )

In [15]:
from sklearn.ensemble import BaggingRegressor

br2 = BaggingRegressor(base_estimator=rf2)

br2.fit(X_train,y_train)
predbr2 = br2.predict(x_cv)
score8 = br2.score(x_cv,y_cv)
print(score8)

kf8 =  cross_val_score(br2, x_cv, y_cv, cv = 5).mean()
print(kf8)

predbr2mse = mean_squared_error(predbr2,y_cv)
print(predbr2mse)

0.8858266469160585
0.7742965726859672
35.269652267054454

From the above models we can see that having all feature has improved the model prediction for Random Forest(RF) and Ada Boost Regressor(ADBR) has improved score. Hence choosing RF and ADBR for further tuning. Using Random Search CV. Polynomial feature will also be tested during tuning.

Random Forest Model Tuning

In [16]:
from sklearn.ensemble import RandomForestRegressor

rfModel = RandomForestRegressor()

rfModel.fit(X_train, y_train)
pred3rfModel = rfModel.predict(x_cv)
score9 = rfModel.score(x_cv, y_cv)
print(score9)

kf9 =  cross_val_score(rfModel, x_cv, y_cv, cv = 5).mean()
print(kf9)

pred3rfmodelmse = mean_squared_error(pred3rfModel,y_cv)
print(pred3rfmodelmse)

0.8975221667001724
0.7810202680128929
31.65675219250834
In [17]:
from sklearn.model_selection import RandomizedSearchCV
from scipy.stats import randint as sp_randint
In [18]:
param_dist = {"max_depth": sp_randint(10, 100),
              "max_features": ['auto', 'sqrt'],
              "min_samples_leaf": sp_randint(1, 20),
              "bootstrap": [True, False],
              "n_estimators": sp_randint(50, 150)
             }
In [19]:
samples = 50
rlModelTuned = RandomizedSearchCV(rfModel, param_distributions=param_dist, cv = 5, n_iter=samples, verbose = 2, n_jobs= 4,random_state=1)
rlModelTuned.fit(x_cv, y_cv)

rlModelTuned.best_params_

Fitting 5 folds for each of 50 candidates, totalling 250 fits

[Parallel(n_jobs=4)]: Using backend LokyBackend with 4 concurrent workers.
[Parallel(n_jobs=4)]: Done  33 tasks      | elapsed:    5.9s
[Parallel(n_jobs=4)]: Done 154 tasks      | elapsed:   18.4s
[Parallel(n_jobs=4)]: Done 250 out of 250 | elapsed:   28.5s finished
Out[19]:
{'bootstrap': True,
 'max_depth': 20,
 'max_features': 'auto',
 'min_samples_leaf': 1,
 'n_estimators': 132}
In [20]:
rfFinalRCV = RandomForestRegressor(bootstrap=True,max_depth=20,
max_features='auto',min_samples_leaf= 1,n_estimators=132)

rfFinalRCV.fit(X_train, y_train)
pred4rfFinalRCV = rfFinalRCV.predict(x_cv)

score10 = rfFinalRCV.score(x_cv, y_cv)
print(score10)

kf10 =  cross_val_score(rfFinalRCV, x_cv, y_cv, cv = 5).mean()
print(kf10)

pred4rfFinalRCVmse = mean_squared_error(pred4rfFinalRCV,y_cv)
print(pred4rfFinalRCVmse)

0.901492901876992
0.7911978692877046
30.430139807497376

Ada Boost Model Tuning

In [22]:
from sklearn.ensemble import AdaBoostRegressor

adbrModel = AdaBoostRegressor(base_estimator=rf1)

adbrModel.fit(X_train,y_train)
predadbrModel = adbrModel.predict(x_cv)
score11 = adbrModel.score(x_cv,y_cv)
print(score11)

kf11 =  cross_val_score(adbrModel, x_cv, y_cv, cv = 5).mean()
print(kf11)

preadbrModelmse = mean_squared_error(predadbrModel,y_cv)
print(preadbrModelmse)

0.9019454210065598
0.7957703937795995
30.2903506893455
In [23]:
param_dist_ada = {
 'n_estimators': [50, 100],
 'learning_rate' : [0.01,0.05,0.1,0.3,1],
 'loss' : ['linear', 'square', 'exponential']
 }
In [24]:
samples = 50
adbrModelTuned = RandomizedSearchCV(AdaBoostRegressor(), param_distributions=param_dist_ada, cv = 5, n_iter=samples, verbose = 2, n_jobs= 4,random_state=1)
adbrModelTuned.fit(x_cv, y_cv)

adbrModelTuned.best_params_

/usr/local/lib/python3.6/dist-packages/sklearn/model_selection/_search.py:281: UserWarning: The total space of parameters 30 is smaller than n_iter=50. Running 30 iterations. For exhaustive searches, use GridSearchCV.
  % (grid_size, self.n_iter, grid_size), UserWarning)
[Parallel(n_jobs=4)]: Using backend LokyBackend with 4 concurrent workers.

Fitting 5 folds for each of 30 candidates, totalling 150 fits

[Parallel(n_jobs=4)]: Done  58 tasks      | elapsed:    5.4s
[Parallel(n_jobs=4)]: Done 143 out of 150 | elapsed:   13.0s remaining:    0.6s
[Parallel(n_jobs=4)]: Done 150 out of 150 | elapsed:   13.6s finished
Out[24]:
{'learning_rate': 1, 'loss': 'linear', 'n_estimators': 100}
In [25]:
#{'learning_rate': 1, 'loss': 'square', 'n_estimators': 100}

adbrFinalRCV = AdaBoostRegressor(base_estimator=rf1,learning_rate=1,loss='square',n_estimators=100)

adbrFinalRCV.fit(X_train, y_train)
adbrFinalRCVpred = adbrFinalRCV.predict(x_cv)

score12 = adbrFinalRCV.score(x_cv, y_cv)
print(score12)

kf12 =  cross_val_score(adbrFinalRCV, x_cv, y_cv, cv = 5).mean()
print(kf12)

adbrFinalRCVpredfmse = mean_squared_error(adbrFinalRCVpred,y_cv)
print(adbrFinalRCVpredfmse)

0.9007160619162852
0.7921117054070949
30.670115901228634

Trial Code For PipeLine begins here

In [27]:
from sklearn.pipeline import Pipeline
from sklearn.preprocessing import StandardScaler
from sklearn.linear_model import Ridge
from sklearn.linear_model import Lasso
from sklearn.metrics import mean_squared_error
from sklearn.impute import SimpleImputer
from sklearn.compose import ColumnTransformer

from sklearn.preprocessing import PolynomialFeatures
In [ ]:
concrete_df.columns
Out[ ]:
Index(['cement', 'slag', 'ash', 'water', 'superplastic', 'coarseagg',
       'fineagg', 'age', 'strength'],
      dtype='object')
In [ ]:
steps = [
         ('scalar',StandardScaler()),
         ('poly',PolynomialFeatures(degree=2)),
         ('model',Lasso())
]
In [ ]:
ridgepipe = Pipeline(steps)
In [ ]:
parameters_pipe = [{'model__alpha':np.arange(0,0.5,0.01)}]
In [ ]:
from sklearn.metrics import make_scorer
In [ ]:
scoring = make_scorer(mean_squared_error)
In [ ]:
pipe_final = RandomizedSearchCV(estimator=ridgepipe,
                                param_distributions=parameters_pipe,
                                scoring=make_scorer(mean_squared_error),
                                cv=5,n_jobs=4,return_train_score=True)
In [ ]:
pipe_final.fit(X_train,y_train)
Out[ ]:
RandomizedSearchCV(cv=5, error_score=nan,
                   estimator=Pipeline(memory=None,
                                      steps=[('scalar',
                                              StandardScaler(copy=True,
                                                             with_mean=True,
                                                             with_std=True)),
                                             ('poly',
                                              PolynomialFeatures(degree=2,
                                                                 include_bias=True,
                                                                 interaction_only=False,
                                                                 order='C')),
                                             ('model',
                                              Lasso(alpha=1.0, copy_X=True,
                                                    fit_intercept=True,
                                                    max_iter=1000,
                                                    normalize=False,
                                                    positive=False,
                                                    precompute=False...
                   param_distributions=[{'model__alpha': array([0.  , 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1 ,
       0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2 , 0.21,
       0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3 , 0.31, 0.32,
       0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4 , 0.41, 0.42, 0.43,
       0.44, 0.45, 0.46, 0.47, 0.48, 0.49])}],
                   pre_dispatch='2*n_jobs', random_state=None, refit=True,
                   return_train_score=True,
                   scoring=make_scorer(mean_squared_error), verbose=0)
In [ ]:
print(pipe_final.cv_results_)

{'mean_fit_time': array([0.01849427, 0.01109729, 0.01021991, 0.01412678, 0.01556907,
       0.01791916, 0.01676507, 0.01869974, 0.01487226, 0.01309719]), 'std_fit_time': array([0.00360986, 0.0040469 , 0.00217719, 0.00104736, 0.00232961,
       0.00583896, 0.00515964, 0.00558326, 0.00218266, 0.00551103]), 'mean_score_time': array([0.00613308, 0.00637665, 0.00630002, 0.00365624, 0.01017776,
       0.01112518, 0.00225735, 0.00996504, 0.00657239, 0.00255933]), 'std_score_time': array([3.39866057e-03, 2.23299945e-03, 2.68413915e-03, 2.89588506e-03,
       7.75109928e-03, 4.48734176e-03, 7.16845018e-05, 4.67664987e-03,
       5.60878877e-03, 7.55597139e-04]), 'param_model__alpha': masked_array(data=[0.47000000000000003, 0.15, 0.26, 0.46, 0.11, 0.37, 0.2,
                   0.06, 0.43, 0.07],
             mask=[False, False, False, False, False, False, False, False,
                   False, False],
       fill_value='?',
            dtype=object), 'params': [{'model__alpha': 0.47000000000000003}, {'model__alpha': 0.15}, {'model__alpha': 0.26}, {'model__alpha': 0.46}, {'model__alpha': 0.11}, {'model__alpha': 0.37}, {'model__alpha': 0.2}, {'model__alpha': 0.06}, {'model__alpha': 0.43}, {'model__alpha': 0.07}], 'split0_test_score': array([59.31409487, 54.83804151, 56.76847417, 59.19048653, 54.2755123 ,
       58.37178534, 55.81788346, 53.48252847, 58.8537578 , 53.61585328]), 'split1_test_score': array([77.24798939, 70.83100798, 73.33194776, 76.98389109, 69.03923873,
       75.25907911, 72.64344885, 66.50003783, 76.16012307, 67.00787975]), 'split2_test_score': array([70.13665506, 66.40071387, 66.56496586, 69.92354292, 66.65242527,
       68.30323881, 66.24407426, 67.25201426, 69.33524234, 67.12579757]), 'split3_test_score': array([80.33528342, 77.87084734, 79.2494424 , 80.29621674, 75.26656158,
       79.62872762, 79.3420847 , 72.97485604, 80.13214854, 73.32149784]), 'split4_test_score': array([105.15988307,  95.81396639,  98.37869595, 104.76307998,
        95.34465193, 101.49207464,  96.75113482,  94.39435949,
       103.5928279 ,  94.52204503]), 'mean_test_score': array([78.43878116, 73.15091542, 74.85870523, 78.23144345, 72.11567796,
       76.6109811 , 74.15972522, 70.92075922, 77.61481993, 71.11861469]), 'std_test_score': array([15.19020024, 13.58087022, 13.93443287, 15.10845236, 13.46919759,
       14.3644707 , 13.70115631, 13.3590687 , 14.8582559 , 13.35485405]), 'rank_test_score': array([ 1,  7,  5,  2,  8,  4,  6, 10,  3,  9], dtype=int32), 'split0_train_score': array([76.9475584 , 67.55008278, 71.03360707, 76.67571038, 66.64390225,
       74.45534856, 69.0421148 , 65.49065122, 75.89523835, 65.81832871]), 'split1_train_score': array([72.79660226, 65.35529268, 68.0181763 , 72.52834048, 64.34366319,
       70.50533094, 66.71767257, 63.30884298, 71.745948  , 63.47640618]), 'split2_train_score': array([74.03618678, 63.92109751, 67.35313164, 73.73803703, 62.91052073,
       71.32405801, 65.32833139, 61.68109484, 72.88171896, 61.91502498]), 'split3_train_score': array([71.09143122, 63.87898933, 65.98452589, 70.84085231, 62.76343646,
       68.43064886, 64.9781848 , 61.72275289, 70.03679525, 61.88473901]), 'split4_train_score': array([67.41289484, 57.9389657 , 61.05991814, 67.16970455, 57.18497918,
       64.81326564, 59.20725863, 56.21130454, 66.46617116, 56.37906831]), 'mean_train_score': array([72.4569347 , 63.7288856 , 66.68987181, 72.19052895, 62.76930036,
       69.9057304 , 65.05471244, 61.68292929, 71.40517434, 61.89471344]), 'std_train_score': array([3.16487125, 3.18839762, 3.26393118, 3.1513824 , 3.12076205,
       3.19935188, 3.25386705, 3.06863515, 3.12164057, 3.10867695])}
In [ ]:
print(pipe_final.best_score_)

78.43878116458947

Trial Code for pipeline ends here

Building PipeLine for automation of random Forest Model

In [28]:
clf = Pipeline(steps=[
         ('poly',PolynomialFeatures(degree=3)),
         ('regressor', RandomForestRegressor(bootstrap=True,max_depth=20,
            max_features='auto',min_samples_leaf= 1,n_estimators=132)) 
       ])
clf
Out[28]:
Pipeline(memory=None,
         steps=[('poly',
                 PolynomialFeatures(degree=3, include_bias=True,
                                    interaction_only=False, order='C')),
                ('regressor',
                 RandomForestRegressor(bootstrap=True, ccp_alpha=0.0,
                                       criterion='mse', max_depth=20,
                                       max_features='auto', max_leaf_nodes=None,
                                       max_samples=None,
                                       min_impurity_decrease=0.0,
                                       min_impurity_split=None,
                                       min_samples_leaf=1, min_samples_split=2,
                                       min_weight_fraction_leaf=0.0,
                                       n_estimators=132, n_jobs=None,
                                       oob_score=False, random_state=None,
                                       verbose=0, warm_start=False))],
         verbose=False)
In [29]:
clf.fit(X_train,y_train)
Out[29]:
Pipeline(memory=None,
         steps=[('poly',
                 PolynomialFeatures(degree=3, include_bias=True,
                                    interaction_only=False, order='C')),
                ('regressor',
                 RandomForestRegressor(bootstrap=True, ccp_alpha=0.0,
                                       criterion='mse', max_depth=20,
                                       max_features='auto', max_leaf_nodes=None,
                                       max_samples=None,
                                       min_impurity_decrease=0.0,
                                       min_impurity_split=None,
                                       min_samples_leaf=1, min_samples_split=2,
                                       min_weight_fraction_leaf=0.0,
                                       n_estimators=132, n_jobs=None,
                                       oob_score=False, random_state=None,
                                       verbose=0, warm_start=False))],
         verbose=False)
In [30]:
clfpred = clf.predict(X_test)
In [31]:
scorepolyclf = clf.score(X_test,y_test)
print(scorepolyclf)

0.9101539127679927
In [32]:
clf1 = Pipeline(steps=[
         ('poly',PolynomialFeatures(degree=3)),
         ('regressor',  AdaBoostRegressor(base_estimator=rf1,learning_rate=1,loss='linear',n_estimators=100)) 
       ])
clf1
Out[32]:
Pipeline(memory=None,
         steps=[('poly',
                 PolynomialFeatures(degree=3, include_bias=True,
                                    interaction_only=False, order='C')),
                ('regressor',
                 AdaBoostRegressor(base_estimator=RandomForestRegressor(bootstrap=True,
                                                                        ccp_alpha=0.0,
                                                                        criterion='mse',
                                                                        max_depth=None,
                                                                        max_features='auto',
                                                                        max_leaf_nodes=None,
                                                                        max_samples=None,
                                                                        min_impurity_decrease=0.0,
                                                                        min_impurity_split=None,
                                                                        min_samples_leaf=1,
                                                                        min_samples_split=2,
                                                                        min_weight_fraction_leaf=0.0,
                                                                        n_estimators=100,
                                                                        n_jobs=None,
                                                                        oob_score=False,
                                                                        random_state=None,
                                                                        verbose=0,
                                                                        warm_start=False),
                                   learning_rate=1, loss='linear',
                                   n_estimators=100, random_state=None))],
         verbose=False)
In [33]:
clf1.fit(X_train,y_train)
Out[33]:
Pipeline(memory=None,
         steps=[('poly',
                 PolynomialFeatures(degree=3, include_bias=True,
                                    interaction_only=False, order='C')),
                ('regressor',
                 AdaBoostRegressor(base_estimator=RandomForestRegressor(bootstrap=True,
                                                                        ccp_alpha=0.0,
                                                                        criterion='mse',
                                                                        max_depth=None,
                                                                        max_features='auto',
                                                                        max_leaf_nodes=None,
                                                                        max_samples=None,
                                                                        min_impurity_decrease=0.0,
                                                                        min_impurity_split=None,
                                                                        min_samples_leaf=1,
                                                                        min_samples_split=2,
                                                                        min_weight_fraction_leaf=0.0,
                                                                        n_estimators=100,
                                                                        n_jobs=None,
                                                                        oob_score=False,
                                                                        random_state=None,
                                                                        verbose=0,
                                                                        warm_start=False),
                                   learning_rate=1, loss='linear',
                                   n_estimators=100, random_state=None))],
         verbose=False)
In [34]:
clf1pred = clf1.predict(X_test)
In [35]:
scorepolyclf1 = clf1.score(X_test,y_test)
print(scorepolyclf1)

0.9036174970785649

Mean Squared Error Calculation

In [36]:
from sklearn.metrics import mean_squared_error
clfmse = mean_squared_error(clfpred,y_test)
clf1mse = mean_squared_error(clf1pred,y_test)
print(clfmse)
print(clf1mse)

26.456907125169096
28.381680347403357

Creating a Dataframe for all metrics

In [40]:
import pandas as pd

kf13 = None
kf14 = None

data = {'Name of Model':  ['Decision Tree with All features','Random Forest with All Features','Ada Boost with All features',
                           'Bagging Regressor with All features','Decision Tree with feature set','Random Forest with feature set',
                           'Ada Boost with feature set','Bagging Regressor with feature set','Random Forest after Tuning',
                           'Ada Boost after Tuning','Random Forest with Poly in Pipeline','Ada Boost with Poly in Pipeline'],
        'Score': [score1,score3,score5,score7,score2,score4,score6,score8,score10,score12,scorepolyclf,scorepolyclf1],
        'Cross Val Score':[kf1,kf2,kf3,kf7,kf4,kf5,kf6,kf8,kf10,kf12,kf13,kf14],
        'Mean Squared Error':[dtmse,pred1rfmse,predadbrmse,predbr1mse,pred2mse,pred2rfmse,predadbr2mse,predbr2mse,pred4rfFinalRCVmse,adbrFinalRCVpredfmse,clfmse,clf1mse]
         
        }

metricsdata = pd.DataFrame (data, columns = ['Name of Model','Score','Cross Val Score','Mean Squared Error'])
pd.reset_option("display.max_columns",None)
metricsdata
Out[40]:
Name of Model Score Cross Val Score Mean Squared Error
0 Decision Tree with All features 0.851870 0.563951 45.759188
1 Random Forest with All Features 0.905594 0.779910 29.163148
2 Ada Boost with All features 0.909968 0.802077 27.811917
3 Bagging Regressor with All features 0.892800 0.769426 33.115588
4 Decision Tree with feature set 0.887166 0.612209 34.855856
5 Random Forest with feature set 0.898571 0.782905 31.332831
6 Ada Boost with feature set 0.900861 0.795914 30.625348
7 Bagging Regressor with feature set 0.885827 0.774297 35.269652
8 Random Forest after Tuning 0.901493 0.791198 30.430140
9 Ada Boost after Tuning 0.900716 0.792112 30.670116
10 Random Forest with Poly in Pipeline 0.910154 NaN 26.456907
11 Ada Boost with Poly in Pipeline 0.903617 NaN 28.381680

CONCLUSION

  1. Choose appropriate Regression models for evaluating prediction of strength of cement. These models were Decision Tree Regressor, Random Forest Regressor, Ada Boost Regressor and Bagging Regressor.

  2. These models were trained in 2 ways. The first way of training was done with all the features being included. The Second way of training was done with certain features which seemed to have higher impact than other features towards predicting strength.

It was found that all the models which included all the features for training had more impact on the prediction score.

  1. Two models showed highest potential. These being Random Forest and Ada Boost.

  2. These models were further tuned using Randomized Search CV.

  3. All the models above have these metrics for evaluation - Mean Squared Error, prediction Score and Cross Val Score.

  4. Random Forest Regressor and Ada Boost Regressor Both had very small differences in the prediction score. But there was a considerable difference in the MSE.

  5. Ada Boost Regressor had a better MSE than Random Forest Regressor.

  6. Pipeline automation was built for both Ada Boost Regressor and Random Forest Regressor.

  7. In the pipeline, Polynomial feature to see whether it improved the score. There was a good improvement from order degree 2 than degree 3. (

There was a requirement in the project description which mentioned that exploration of dataset to find new features from existing features. In the Concrete_df dataframe there was no such features which could be combined in a meaningful way to create a better variable than the existing variable to reduce the curse of dimensionality.

For the linear regression model higher degree better the socre. But too high a degree results in over fit

)

  1. K - Fold Cross Validation has been done for all models. Ada Boost Pipeline and Random Forest Pipeline don't have a K-fold score because the K-fold score is already known for the models. Since this is a Pipeline shipment K - Fold Score wasn't applied since the model was tested on the Reserved 20% data ( Assumed to be Production Data )

  2. The pipeline models was trained on the reserved test Data. ( X_test, Y_test ) from the 60 : 20 : 20 split.

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